Click anywhere to start. This is a simple tool to measure your reaction time. The average (median) reaction time is 273 milliseconds, according to the data collected so far. In addition to …

The meaning of REACTION is the act or process or an instance of reacting. How to use reaction in a sentence.

A chemical reaction is the change that happens when two or more substances are mixed with each other.

A reaction is an action taken in response to something. If you're telling your parents that you want to move out, you'll see by their reaction that they're sad about it.

Oct 10, 2025 · A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. Substances …

Oct 8, 2025 · reaction (plural reactions) An action or statement in response to a stimulus or other event.

REACTION meaning: 1. something you say, feel, or do because of something that has happened: 2. the ability to move…. Learn more.

Synonyms for REACTION: response, answer, take, reply, backlash, reflex, revulsion, recoil; Antonyms of REACTION: action, effect, behavior, cause

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Reaction may refer to a process or to a response to an action, event, or exposure.